Pet litter window box



FIG. 1 is a perspective view of a pet litter window box showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front view thereof showing the front door of the box separated from the remaining structure of the box. 

The ornamental design for a pet litter window box, as shown. 